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Date: Fri, 9 Oct 2015 00:16:28 +0300
From: "Michael S. Tsirkin" <mst@redhat.com>
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Subject: [Qemu-devel] [PULL 01/25] configure: probe for memfd
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To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>, Michael Tokarev <mjt@tls.msk.ru>, Gerd Hoffmann <kraxel@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, =?us-ascii?B?PT9VVEYtOD9xP01hcmMtQW5kcj1DMz1BOT0yMEx1cmVhdT89?= <marcandre.lureau@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>

From: Marc-Andr=E9 Lureau <marcandre.lureau@redhat.com>

Check if memfd_create() is part of system libc.

Signed-off-by: Marc-Andr=E9 Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 configure | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/configure b/configure
index 2d2a498..a68863c 100755
--- a/configure
+++ b/configure
@@ -3486,6 +3486,22 @@ if compile_prog "" "" ; then
   eventfd=3Dyes
 fi
=20
+# check if memfd is supported
+memfd=3Dno
+cat > $TMPC << EOF
+#include <sys/memfd.h>
+
+int main(void)
+{
+    return memfd_create("foo", MFD_ALLOW_SEALING);
+}
+EOF
+if compile_prog "" "" ; then
+  memfd=3Dyes
+fi
+
+
+
 # check for fallocate
 fallocate=3Dno
 cat > $TMPC << EOF
@@ -4857,6 +4873,9 @@ fi
 if test "$eventfd" =3D "yes" ; then
   echo "CONFIG_EVENTFD=3Dy" >> $config_host_mak
 fi
+if test "$memfd" =3D "yes" ; then
+  echo "CONFIG_MEMFD=3Dy" >> $config_host_mak
+fi
 if test "$fallocate" =3D "yes" ; then
   echo "CONFIG_FALLOCATE=3Dy" >> $config_host_mak
 fi
--=20
MST